[Boatanchors] HP-8708A Synchronizer?

[Ian Wilson]

Hi David,

The power supplies in my 606B appear to be OK, but I will probably replace
the
electrolytics if I can get everything else set up.

At the moment I am somewhat mystified by steps 5.42 and 5.44 in the manual.
The carrier zero step works as expected (step 5.42), but then in 5.44 I get
no
output unless I change the modulation amplitude control (which is wrong).
I'm sure
I'll figure it out eventually.

73, ian K3IMW




On Mon, Mar 31, 2014 at 8:15 AM, David C. Hallam <dhallam at knology.net>wrote:

> Ian,
>
> I have a 606B and a synchronizer.  Now that my 606B is working properly, I
> will get an idea of how well it works.  I had to replace filter capacitors
> in the power supply.  That was a PITA job as the capacitors are somewhat
> unusual.  The can is insulated and the negative is not connected to the
> can. The ripple was way out of spec and the 606B frequency wouldn't
> stabilize.
>
> I do have a manual for it.
>
> David
> KW4DH
>
>
> On 3/30/2014 9:04 PM, Ian Wilson wrote:
>
>> Thanks, Richard (and others who have replied similarly).
>>
>> There appear to be two 8708 manual versions available through ArTek (who I
>> had
>> never heard of until a few minutes ago). I will do that if I can't find
>> the
>> info floating
>> around somewhere.
>>
>> 73, ian K3IMW
>>
>>
>>
>> On Sun, Mar 30, 2014 at 5:54 PM, Richard Knoppow <1oldlens1 at ix.netcom.com
>> >wrote:
>>
>>  ----- Original Message ----- From: "Ian Wilson" <ianmwilson73 at gmail.com>
>>> To: <boatanchors at qth.net>
>>> Sent: Sunday, March 30, 2014 3:25 PM
>>> Subject: [Boatanchors] HP-8708A Synchronizer?
>>>
>>>
>>>
>>>   Recently acquired an HP-606B signal generator. Although my initial
>>>
>>>> impression is that this is probably stable enough for most of my needs,
>>>> the 'Synchronizer' sounds like an interesting box.
>>>>
>>>> I would guess that this is some sort of comb generator combined with
>>>> a mixer-type phase detector that forms a weakly-locked PLL. Would be
>>>> interesting to find a manual (no luck so far, not on BAMA, not on the HP
>>>> historical sites that I've looked at). Would be glad of any info.
>>>>
>>>> There are a couple of these units on eBay but they are going for much
>>>> more than I paid for my 606B :)
>>>>
>>>> 73, ian K3IMW
>>>>
>>>>       Try  ArtekManuals.com  not free but excellent reproductions. He
>>> may
>>> have it.
>>>
>>>
>>> --
>>> Richard Knoppow
>>> Los Angeles
>>> WB6KBL
>>> dickburk at ix.netcom.com
>>>
>>>  ______________________________________________________________
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